Report node voltages by primary and secondary

[daniel-thom]

The final metrics look something like this. One set of metrics per scenario and then one for primaries and one for secondaries. The final table will flatten these out.

{
  "scenarios": {
    "control_mode": {
      "primaries": {
        "metric_1": {
       }
     }
   }
 }
}

[KwamiS]

The final metrics look something like this. One set of metrics per scenario and then one for primaries and one for secondaries. The final table will flatten these out.

{
  "scenarios": {
    "control_mode": {
      "primaries": {
        "metric_1": {
       }
     }
   }
 }
}

Okay. Looks good!

[KwamiS]

We can move forward.